Burner for gas-stoves



W. A. THOMPSON. BURNER FOR GAS sTovss.

Nb. 50,515. Patented 0ct.'17, 1865.

. Fig.1. Fig.2-

UNITED STATES PATENT OFFICE.

I WM. A. THOMPSON, ,OF BROOKLYN, NEW YORK.

BURNER FOR GAS-STOVEQS.

Specification forming part of Letters Patent No. 50,516, dated October 17, 1865.

To all whom it may concern:

Be it known that I, WILLIAM A. THOMP- SON, of Brooklyn, in the county of Kings and State of New York, have invented certain new and useful Improvements in Etnas or Burners for Gas-Stoves; and I do hereby declare that the following is a full and exact description thereof.

The accompanying drawings form a part of this specification.

Figure l is a side elevation, and Fig. 2 is a central vertical section.

Similar letters of reference indicate like parts. i

The portion of a gas stove in whichthe gas is mingled with theatmospheric airand ignited, and which is sometimes called the etna, is

in all its forms designed with a view to effect complete combustion of the gas with the quan:

tity of'aiiyso as to generate the-most-concen trated or intense heat, and to so burn the gas that its effect shall be mainly, and, if possible, altogether available as heat, and .not as light.

My invention is an etna which accomplishes these ordinary results in a very'pert'ect manner, may be formed of sheet metal, and placed upright, near the base of the stove, as usual, and, in addition to the ordinary qualities,is adapted to be less frequently clogged or deranged and more easily set in order when such occur.

My etna, like others, has a perforated metal plate, through which the mingled gas and air is passed, and has above this a contracted top, the utility of which has been before tested and approved. The top of my etna is removable at will to allow of better clearing or cleaning the perforated plate when it becomes obstructed by the caking thereon of any'gravies 'or other matter accidentally spilled; but the accumulationof any obstructing material thereon is much less likely than with other forms of effective etnas, in consequence of thenovel formation or construction and arrangement which I have adopted.

The nature of my invention consists in providing an annular space around the perforated plate, and within the bottom of the contracting cap or top piece, so arranged as to admit a thin current of air to ascend around the interior of the top piece, not deflected inward until it has ascended to a considerable height, but lying against the 'top piece and affording an unobstructed egress through the perforations in the perforated plate quite to' the edges. My arrangement consequently promotes the durability of the top by keeping cool air against it, and promotes the perfection of the combustion by allowing the whole area of the perforations to deliver gently and uniformly.

Another and very important effect of my arrangement and construction is to allow coffee or the like material spilled on the etna to flow freely oil through the annular space, and not to be allowed to remainon the perforated plate a long time, to be there evaporated and clog the holes. My device allows this without exposing the flame to deflecting currents, and altogether accomplishes the desirable ends requiredin an etna,produciug an even blue flame without light. and smell more satisfactorily than any other known to me.

To enable others-skilled int-he art tomake and use my invention, 1 will proceed to describe its construction and operation by the aid ofthe drawings and of the letters of referencemarked thereof.

Ais a plain hollow cylinder of sheet-iron,

grooved together as usual in stove-pipe and like constructions, to endure heat, it necessary.

B B B are strips of stout sheet-iron or other suitable material, riveted upon A by meansof rivet O, as represented.

D D is a cap adapted to fit over the strips or arms B and be supported thereon, with liberty to be removed bythe application of a slight force when necessary to allow the parts below to be cleaned or removed. The upper edge of the part A is turned out a little, and the, perforated plate ais secured thereon by being bent under it all around, as indicated. The part D of my cap'is cylindrical or very slightly taper ing. The part D, oh the contrary, is very considerably contracted. I can form the part D D of brass or other metal at pleasure by spiin ning or other ordinary means, but I propose usually to employ good sheet-iron.

My etna may be applied in the ordinary manner to any of the approved forms of gas-stoves.

1 will designate the annular opening by E.

1 take care to continue the top I) D down so as to prevent the admission of any horizon tal disturbing currents of air, but. the precise depth to which the lower edge of the top shall be carried below the top of the perforated plate a is not material. It may end on a level therewith or be carried considerably lower.

I do not confine myself to the use of strips or arms B attached to the cylinder A, as the same effect may obviously be produced by securing the arms B to the cap or topD D and letting the arms B slip m'er the top of the work below. In sueh'oases I make ahead or other stop at a proper level on A to support thepartsand prevent the top D D from sinking down toolow and becoming badly adjusted.

I prefer to make the annular space E only about one-eighth of an inch wide, but I do not confine myself to any specific width. I

make the cylinder A of diameters ranging from 

